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PODOSTÉMACÉES. 267<br />

GENERA<br />

I. LAWIE^E.<br />

1. Lawîa TUL. — Flores hermaphroditi regulares; receptacuio<br />

convexo. Calyx membranaceus, 3-lobus, imbricatus. Stamina 3, cum<br />

lobis calycis alternantia hypogyna libéra ; filamentis subulatis ; antheris<br />

introrsis, 2-rimosis. Germen superum, 3-loculare; styli ramis 3,<br />

linearibus, intus stigmatosis, erectis contiguis, mox patentibus.<br />

Ovula oo, anatropa, placentas crassœ axili inserta. Fructus ovoideus<br />

capsularis septicidus septifragusque ; valvis 3, costatis. Semina oo,<br />

minima compressiuscula exalbuminosa; embryonis recti carnosi eotyledonibus<br />

crassis ; radicula brevi. — Herbae aquaticœ, annuae v.<br />

perennes ; caulibus adnatis thalliformibus lobatis, nunc elongatis<br />

fluitantibus; foliis setaceis parvis in ramis elongatis sparsis, in gemmis<br />

floriferis fasciculatis; gemmis floriferis sparsis v. caulis basi adnatis;<br />

pedunculis solitariis, basi foliorum fasciculo plus minus connatorum<br />

cinctis. (India or penins., Zeylania.) — Vid. p. 256.<br />

2. Tristicha DUP. TH.' — Flores fere Lawiœ; staminé 1, v.<br />

rarius 2, alternisepalis. — Herbœ inundatœ bryoideae; foliis conferlim<br />

tristichis ; serieum 2 latioribus patentibus ; floribus ad summos<br />

ramulos breviores plerumque 2-nis; pedunculis mox accretis, basi<br />

bracteis paucis quam folia majoribus stipatis. Caetera Lawiœ. (America<br />

et Africa trop. 0 -)<br />

1. Nov. gen. madag., 3, n. 8. — A. RICH., in V, 55. — Philocrena BONG., in Mém. Ac. Pé-<br />

Did. class., V,635 (non ACHAR.). — ENDL., Gen., tersb., sér. 6, I, 80, t. 6.<br />

n. 1835. — TUL., Podost. Monogr., 179. — WEDD., 2. Spec. 4, 5. PRESL, Bot. Bem., 149 (Po-<br />

in DC Prodr., XVII; 44. — B. H., Gen., III, dostemum); Rel Hœnk., I, 86. — A. S.-H.,<br />

108, n. 1. — H. BN, in Bull. Soc. Linn. Par., Pl. bras., I, 82 (Dufourea). — WIGHT, Icon.,<br />

615, 646. — Dufourea BOR Y, in W. Spec. pl, t. 1920.

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